CN105775147B - A kind of airplane intake closed-loop flow control device and control method - Google Patents
A kind of airplane intake closed-loop flow control device and control method Download PDFInfo
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- CN105775147B CN105775147B CN201610213705.0A CN201610213705A CN105775147B CN 105775147 B CN105775147 B CN 105775147B CN 201610213705 A CN201610213705 A CN 201610213705A CN 105775147 B CN105775147 B CN 105775147B
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- 230000010349 pulsation Effects 0.000 claims description 6
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
- F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
- F15D1/00—Influencing flow of fluids
- F15D1/002—Influencing flow of fluids by influencing the boundary layer
- F15D1/0065—Influencing flow of fluids by influencing the boundary layer using active means, e.g. supplying external energy or injecting fluid
- F15D1/008—Influencing flow of fluids by influencing the boundary layer using active means, e.g. supplying external energy or injecting fluid comprising fluid injection or suction means
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B64—AIRCRAFT; AVIATION; COSMONAUTICS
- B64D—EQUIPMENT FOR FITTING IN OR TO AIRCRAFT; FLIGHT SUITS; PARACHUTES; ARRANGEMENT OR MOUNTING OF POWER PLANTS OR PROPULSION TRANSMISSIONS IN AIRCRAFT
- B64D33/00—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for
- B64D33/02—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes
- B64D2033/0226—Arrangements in aircraft of power plant parts or auxiliaries not otherwise provided for of combustion air intakes comprising boundary layer control means
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Abstract
The invention provides a kind of airplane intake closed-loop flow control device and control method, control device is made up of microjet pressure regulator valve, signal processor, real-time controller, pressure sensor and oscillatory pressure pick-up, by adjusting the pressure of microjet in real time, realize and the closed-loop flow that air intake duct flows is controlled.Control method is comprised the steps of：A. pressure sensor failure is judged；B. oscillatory pressure pick-up failure is judged；C. dimensionless value of feedback is calculated；D. control targe value is calculated；E. systematic steady state and more new control instruction are judged；F. signal measurement and processing；G. repeat step a ~ f.The airplane intake closed-loop flow control device and control method of the present invention, the susceptibility of sensor usage quantity, the reliability and maintainability for improving control system, reduction control system to state of flight can be reduced, is conducive to simplify control rule to design and lift control effect.
Description
Technical field
The invention belongs to jet plane propulsion system field, and in particular to a kind of airplane intake closed-loop flow control dress
Put and method.
Background technology
The main function of jet plane air intake duct is to provide that pitot loss is small, flow distortion is small and flow field arteries and veins for engine
Dynamic weak air-flow.The aeroperformance of air intake duct has a direct impact to motor power, stability and durability, and then has influence on winged
The flying quality of machine.Modern high invisbile plane generally uses Serpentine Inlet, and the main aerodynamics problem of air intake duct includes Secondary Flow
Dynamic, separation is flowed and produced flow losses, distortion and pulses.Weaken or suppress the flowing point of air intake duct using flow control technique
From the aeroperformance of air intake duct can be significantly improved.
Existing flow control technique is mainly installed spoiler in air intake duct internal face, faced based on passive approach
The problem of be that design point is single, off-design performance is remarkably decreased, spoiler fracture by fatigue and then influence engine health.It is based on
The flow control technique of microjet can carry out closed-loop control according to state of flight, adapt to modern high performance invisbile plane broad
Flight envelope, be optimal control.About microjet relevant control technology United States Patent (USP) 8894019B2,
Disclosed on 8303024B2,8225592B1,6837456B1, but be not directed to the control application of air intake duct closed-loop flow.
The U.S. it is proposed that a kind of closed-loop flow control method based on microjet, it is characterized in that：Directly using 4 pulsation pressures
Power root-mean-square value calculates the value of feedback for having dimension, using single area's PID control rule regulation microjet pressure, finally makes value of feedback and control
The error of desired value processed levels off to zero.The control method is primarily present following two problems.
1）Generally, with the increase of microjet pressure, fluctuation pressure root-mean-square value can constantly reduce, but when microjet pressure
After more than one threshold pressure of power, fluctuation pressure root-mean-square value can reach minimum and keep constant, directly using fluctuation pressure
The value of feedback that root-mean-square value is calculated can also reach minimum and keep constant.This threshold pressure is exactly optimal microjet pressure.
After microjet pressure exceedes threshold pressure, the control effect that control system reaches is the same.Now, once control system is deposited
In overshoot, it may result in microjet and be stabilized to the state of high pressure, so as to cause energy dissipation.In addition, there is the value of feedback of dimension
It is more sensitive to flight status parameter, it is unfavorable for the design of control law under maneuvering condition.Experiment shows that this method is in maneuvering condition
Under control error it is very big.
2）In terms of system reliability angle, four oscillatory pressure pick-ups are the method use, and do not consider Redundancy Design,
Therefore system reliability is not high.
The content of the invention
The invention solves the problems that a technical problem there is provided a kind of airplane intake closed-loop flow control device, this hair
Bright another to be solved technical problem there is provided a kind of airplane intake closed-loop flow control method.
The airplane intake closed-loop flow control device of the present invention, is characterized in, including including microjet pressure regulator valve, signal
Processor, real-time controller, first sensor and oscillatory pressure pick-up.
The inlet end of microjet pressure regulator valve is connected with the bleed ports of engine, and outlet side is connected with the pressure stabilizing cavity of microjet,
Pressure stabilizing cavity is located on the outer surface of air intake duct.
The quantity of oscillatory pressure pick-up is m, m >=2, on the outlet of air intake duct, for measuring wall not
With the fluctuation pressure at position, obtain fluctuation pressure signal and export to signal processor；The quantity of described first sensor
For n, n >=2, on the internal face of pressure stabilizing cavity, the pressure for measuring microjet obtains microjet pressure signal and exported
To signal processor.
Signal processor includes signal conditioner, low pass filter, bandpass filter and root mean square calculator；First sensing
The microjet pressure signal of device amplifies through signal conditioner, export to the input of real-time controller after low pass filtered
End；The fluctuation pressure signal of oscillatory pressure pick-up amplifies through signal conditioner, bandpass filter bandpass filtering, root mean square calculation
Device is calculated after root mean square, is exported to the input of real-time controller.
Real-time controller includes input, output end, processor and memory；What input reception flight control system was sent flies
Microjet pressure signal and fluctuation pressure root-mean-squared that row state parameter, signal processor are sent, and it is converted into digital letter
Number；Processor reads the data signal of input, while data signal is preserved in memory, processor is utilized in memory
First sensor breakdown judge program, oscillatory pressure pick-up breakdown judge program, feedback calculation procedure, control targe calculate
Program, stable state determining program, subregion PID control program calculate control instruction and exported to output end；Output end is by control instruction
Data signal be converted to and exported after analog signal to microjet pressure regulator valve.
Signal processor is that respectively one independent processing of assignment is led to for each microjet pressure signal and fluctuation pressure signal
Road.
Flight status parameter includes flying speed, aspect, flying height.
First sensor uses 1 every time, and remaining first sensor is backup.
Oscillatory pressure pick-up uses 1 ~ 2 every time, and remaining oscillatory pressure pick-up is backup.
The airplane intake closed-loop flow control method of the present invention, is characterized in, comprises the following steps：
A. first sensor failure is judged
Real-time controller reads the microjet pressure signal of signal processor output, the first sensor in memory
Breakdown judge program, judge 1 currently used first sensor whether failure；If it is judged that being no, this is continuing with
Sensor, and take its measure microjet pressure value beP j ；If it is judged that being yes, in remaining n-1 first sensor
It is middle selection 1 first sensor working properly, and take its measure microjet pressure value beP j ；If all of n first
Sensor breaks down, then closing control system.
B. oscillatory pressure pick-up failure is judged
Real-time controller reads the fluctuation pressure root-mean-squared of signal processor output, the pulsation pressure in memory
Force snesor breakdown judge program, judge currently used 1 or 2 oscillatory pressure pick-ups whether failure；If it is determined that knot
Fruit is no, then is continuing with, and it is Δ to calculate the fluctuation pressure root-mean-square value of measurementp rmsi , i=1 or i=2；If it is judged that
It is yes, 1 or 2 oscillatory pressure pick-ups working properly is reselected in remaining oscillatory pressure pick-up, and calculate
The fluctuation pressure root-mean-square value of measurement is Δp rmsi , i=1 or i=2；Occurs event if all of m oscillatory pressure pick-up
Hinder, then closing control system.
C. dimensionless value of feedback is calculated
Real-time controller utilizes Δp rmsi Divided byP j Obtain nondimensional Δp rmsi /P j , further according to the first sensor used
Value of feedback calculation procedure in numbering, oscillatory pressure pick-up numbering and quantity, memory, selects value of feedback computation modelf, meter
Calculate the dimensionless value of feedback of characterization control effectH res ：
When using 1 oscillatory pressure pick-up, value of feedback computation modelfFor：
Or
D. control targe value is calculated
Real-time controller is according to current flight state parameter, first sensor numbering, oscillatory pressure pick-up numbering sum
Amount, control targe calculation procedure and value of feedback computation model in memoryf, calculate corresponding control targe valueH ref 。
E. systematic steady state and more new control instruction are judged
Stable state determining program of the real-time controller in memory,H ref WithH res Error amount, judge whether system is located
In stable state；If the determination result is YES, then current control instruction is maintained, otherwise calculating control according to subregion PID control program refers to
Order；Microjet pressure regulator valve adjusts microjet pressure according to control instruction, and then influences the state in separation whirlpool in air intake duct so that enter
The measured value of the oscillatory pressure pick-up in air passage outlet section changes.
F. signal measurement and processing
First sensor and oscillatory pressure pick-up measure the microjet pressure signal after being updated respectively and pulsation is pressed
Force signal, signal processor to real-time controller, repeats rear output after microjet pressure signal and fluctuation pressure signal transacting
Step a ~ f, until stopping closed-loop control.
The timing statisticses of fluctuation pressure root-mean-square value are 0.5 second ~ 1.0 seconds.
Flight status parameter reaches that the stable state judgment criterion of stable state is：Flight status parameter kept constant within 5 minutes
AndH ref WithH res Relative error within ± 5%.
The airplane intake closed-loop flow control device and control method of the present invention has the advantage that：
（1）Using only 1 ~ 2 oscillatory pressure pick-up, the probability of system jam is reduced, and is sensed to first
Device and oscillatory pressure pick-up are backed up, and still are able to after part first sensor and oscillatory pressure pick-up break down
Ensure control system normal work；
（2）First sensor is added in a device, and utilizes the nondimensional value of feedback of microjet calculation of pressure, is not only had
Beneficial to susceptibility of the reduction control system to flight status parameter, additionally it is possible to ensure value of feedback with the increase of microjet pressure
Dullness reduces so that even if control system also precise and stable can arrive optimum controlling point under overshoot state, do not result in excessive
Energy dissipation；
（3）The nondimensional value of feedback of microjet calculation of pressure is used so that the excursion of value of feedback is larger, so as to cause
Control error span big, the control accuracy influence on control system is larger.Using subregion PID control, i.e., in different errors
With the different pid control parameters of setting（Including proportional gain、Storage gain and the differential gain）, it is possible to resolve control error change model
The problem of enclosing big, improves the control accuracy of control system, particularly improves the control performance under maneuvering condition；
（4）, actively will control when aircraft and engine parameter do not change for a long time and control system is in stable state
Instruction keeps constant, it is to avoid microjet pressure regulator valve carries out frequently minor adjustments, so that the failure for reducing microjet pressure regulator valve is general
Rate, improves service life.
Show by ground experiment, airplane intake closed-loop flow control device of the invention and control method, in level
Under surface state, any change Mach can be realized in the case of a given component area pid control parameter and a control targe value
Closed-loop control under number operating mode, it is ensured that inlet characteristic is in preferable state all the time.
Brief description of the drawings
Fig. 1 is aircraft propelling system profile；
Fig. 2 is the structure chart of the airplane intake closed-loop flow control device of the present invention；
Fig. 3 is the flow chart of the airplane intake closed-loop flow control method of the present invention；
In figure, the engine 13. of 11. air intake duct 12. separation whirlpool 14. jet pipe, 21. pressure regulator valve, 22. pressure stabilizing cavities 23. are micro-
The real-time controller of 3. signal processor of jet 24. first sensor, 25. oscillatory pressure pick-up 4..
Embodiment
Describe the present invention in detail with reference to the accompanying drawings and examples.
Embodiment 1
As shown in Figure 1 and Figure 2, airplane intake closed-loop flow control device of the invention, including microjet pressure regulator valve 21,
Signal processor 3, real-time controller 4, first sensor 24 and oscillatory pressure pick-up 25.
The inlet end of microjet pressure regulator valve 21 is connected with the bleed ports of engine 12, outlet side and the pressure stabilizing cavity of microjet 23
22 are connected.Pressure stabilizing cavity 22 is located on the outer surface of air intake duct 11, and 18 road microjets are arranged altogether.
Oscillatory pressure pick-up 25 totally 4, on the outlet of air intake duct 11（From left to right number consecutively 1 ~
4）, the fluctuation pressure of wall is measured, fluctuation pressure signal is obtained and exports to signal processor 3.First sensor 24 totally 2,
The left side and right side of pressure stabilizing cavity 22 are separately mounted to, the pressure of microjet 23 is measured, microjet pressure signal is obtained and exports extremely
Signal processor 3.
Signal processor 3 includes signal conditioner, low pass filter, bandpass filter and root mean square calculator.First passes
The microjet pressure signal of sensor 24 amplifies through signal conditioner, export to real-time controller 4 after low pass filtered
Input.The fluctuation pressure signal of oscillatory pressure pick-up 25 amplifies through signal conditioner, bandpass filter bandpass filtering,
Root calculator is calculated after root mean square, is exported to the input of real-time controller 4.Signal processor 3 is each microjet pressure
Force signal and fluctuation pressure signal respectively assign an independent treatment channel.6 signal conditioners, 2 are had for the present embodiment
Individual low pass filter, 4 bandpass filters and 4 root mean square calculators.
Real-time controller 4 includes input, output end, processor and memory.Input receives what flight control system was sent
Microjet pressure signal and fluctuation pressure root-mean-squared that aircraft state parameter, signal processor 3 are sent, and it is converted into numeral
Signal.Aircraft state parameter includes flying speed, aspect, flying height.Processor reads the data signal of input simultaneously
Preserve in memory, processor reads first sensor breakdown judge program, oscillatory pressure pick-up failure in memory
Determining program, feedback calculation procedure, control targe calculation procedure, stable state determining program, subregion PID control program, calculate control
Instruct and export to output end.Output end, which is converted to the data signal of control instruction, to be exported after analog signal to microjet pressure regulation
Valve 21.
System initially sets the first sensor 24 and No. 1 oscillatory pressure pick-up 25 on the left of use, and remaining is backup.
The value of feedback computation model corresponding with the combination be：
After closed-loop control system opening, job step is as shown in figure 3, specific as follows：
A. the failure of first sensor 24 is judged
Real-time controller 4 reads the microjet pressure signal that signal processor 3 is exported, the first sensing in memory
Device breakdown judge program, judge currently used first sensor 24 whether failure；If it is judged that being no, this is continuing with
First sensor 24, and take its microjet pressure value measured to be Pj；If it is judged that being yes, remaining first sensing is judged
Whether device 24 is normal, if it is judged that being yes, then the microjet pressure value for taking its measurement isP j ；If 2 first sensors
24 break down, then stop closed-loop control.
B. the failure of oscillatory pressure pick-up 25 is judged
Real-time controller 4 reads the fluctuation pressure root-mean-squared that signal processor 3 is exported, the pulsation in memory
Pressure sensor failure determining program, judge No. 1 currently used oscillatory pressure pick-up 25 whether failure；If it is judged that
It is no, then is continuing with, and it is Δ to calculate the fluctuation pressure root-mean-square value of measurementp rms1 ；If it is judged that being yes, in residue
Oscillatory pressure pick-up 25 in reselect 1 or 2 oscillatory pressure pick-ups 25 working properly, and calculate the arteries and veins of measurement
Dynamic pressure root-mean-square value is Δp rmsi , i=1 or i=2；Break down, then stop if all of 4 oscillatory pressure pick-ups 25
Only closed-loop control.
C. dimensionless value of feedback is calculated；
Real-time controller 4 utilizes Δp rmsi Divided byP j Obtain nondimensional Δp rmsi /P j （I=1 or i=2, are determined with step b
The quantity of oscillatory pressure pick-up 25 it is consistent）, numbered further according to the first sensor 24 used, oscillatory pressure pick-up 25 is numbered
With the value of feedback calculation procedure in quantity, memory, the dimensionless value of feedback of characterization control effect is calculatedH res ：
If currently used first sensor 24 and oscillatory pressure pick-up 25 are working properly in step a and b, after
It is continuous to use following value of feedback computation model：
Result of calculation is hereinH res =20.If having changed first sensor 24 in step a and b or fluctuation pressure being passed
Sensor 25, then change value of feedback computation model as needed.
D. control targe value is calculated；
Real-time controller 4 is numbered according to current flight state parameter, first sensor 24, oscillatory pressure pick-up 25 is numbered
With the control targe calculation procedure and value of feedback computation model in quantity, memoryf, calculate current corresponding control targe value
For：H ref =0.7。
E. systematic steady state and more new control instruction are judged
Stable state determining program of the real-time controller 4 in memory,H ref WithH res Error amount, judge whether system is located
In stable state, judgment criterion is：Flight status parameter kept within 5 minutes it is constant andH ref WithH res Relative error ± 5%
Within.If the determination result is YES, then current control instruction is maintained, control instruction is otherwise calculated according to subregion PID control program：
1. whenH ref WithH res Absolute error be more than 0.4 when：kp=0.03, ki=0.02, kd=0.1；
2. it is other：kp=0.09, ki=0.08, kd=0.1。
Wherein, kp 、kiAnd kdThe respectively proportional gain of PID controller, storage gain and the differential gain.
Microjet pressure regulator valve 21 adjusts microjet pressure, and then the flow regime of influence air intake duct 11 according to control instruction,
So that the measured value of oscillatory pressure pick-up 25 changes.
F. signal measurement and processing
First sensor 24 and oscillatory pressure pick-up 25 measure microjet pressure signal and fluctuation pressure signal respectively, hair
Deliver to signal processor to be handled, repeat step a ~ f, until stopping closed-loop control.
Found in ground experiment, if directly passed throughH res =Δp rms1When calculating has the value of feedback of dimension,H res WithP j Not
It is to be monotonically changed, but changes after optimal microjet pressure is reached in level, now system is difficult to be stabilized to optimal microjet
Pressure spot.And useH res =Δp rms1/P j When calculating dimensionless value of feedback,H res WithP j Monotone decreasing, it is meant that often give one
Control targe valueH ref , one and only one control point is corresponded to therewith, therefore system is easy to be stabilized to optimal microjet pressure
Point, so as to significantly improve the control performance of system.
It also found, use in ground experimentH res =Δp rms1/P j When calculating dimensionless value of feedback, the control under friction speed
Desired valueH ref Interval with a superposition, so as to set an equal control targe value at various speedsH ref ,
Which simplifies the design of control law become under speed operating mode.The value of feedback computation model causesH res Excursion it is very big, therefore
Introduce subregion PID control rule, it is ensured that control system has more preferable control performance in different error bands.Ground experiment table
Bright, the more single area's PID control error of subregion PID control reduces 70%, and good control has been issued in any acceleration, deceleration operating mode
Effect.
Embodiment 2
Embodiment 2 and embodiment 1 are basically identical, and the main distinction is, the timing statisticses of fluctuation pressure root-mean-square value are
0.8s；In step a, the first sensor 24 on the left of the discovery of real-time controller 4 breaks down, therefore first on the right side of use passes
Sensor 24 is substituted.By the first sensor 24 in left side is equal with the microjet pressure value that the first sensor 24 on right side is surveyed,
Therefore other steps are constant.
Embodiment 3
Embodiment 3 and embodiment 1 are basically identical, and the main distinction is, the timing statisticses of fluctuation pressure root-mean-square value are 1s；
In stepb, real-time controller 4 finds No. 1 failure of oscillatory pressure pick-up 25, therefore uses No. 2 oscillatory pressure pick-ups 25
Substitute；The value of feedback computation model used in step c is same as Example 1, and result of calculation isH res =20.8；In step d,
Because having used No. 2 oscillatory pressure pick-ups 25, corresponding control targe value is changed intoH ref =0.82；In step e, subregion PID
Control law is changed into：
1. whenH ref WithH res Absolute error be more than 0.5 when：kp=0.03, ki=0.02, kd=0.1；
2. it is other：kp=0.09, ki=0.08, kd=0.3。
Embodiment 4
Embodiment 4 and embodiment 1 are basically identical, and the main distinction is, use following nonlinear value of feedback computation model：
Result of calculation isH res =4.47；In step d, corresponding control targe value is changed intoH ref =0.84；In step e,
Subregion PID control is restrained：
1. whenH ref WithH res Absolute error be more than 0.5：kp=0.4, ki=0.55, kd=0.1；
2. it is other：kp=0.3, ki=0.35, kd=0.1。
Embodiment 5
Embodiment 5 and embodiment 3 are basically identical, and the main distinction is, in stepb, find No. 1 oscillatory pressure pick-up
After 25 failures, substituted with No. 2 and No. 3 oscillatory pressure pick-ups 25；In step c, value of feedback computation model is changed into：
Result of calculation isH res =2；In step d, corresponding control targe value is changed intoH ref =0.3；In step e, use
Three area's PID control rules：
1. whenH ref WithH res Absolute error be more than 0.5：kp=0.2, ki=0.25, kd=0.2；
2. whenH ref WithH res Absolute error be less than 0.05：kp=0.4, ki=0.55, kd=0.1；
3. it is other：kp=0.3, ki=0.35, kd=0.1。
Claims (8)
1. a kind of airplane intake closed-loop flow control device, it is characterised in that described control device includes microjet pressure regulation
Valve（21）, signal processor（3）, real-time controller（4）, first sensor（24）And oscillatory pressure pick-up（25）；
Described microjet pressure regulator valve（21）Inlet end and engine（12）Bleed ports be connected, outlet side and microjet（23）
Pressure stabilizing cavity（22）It is connected, pressure stabilizing cavity（22）Positioned at air intake duct（11）Outer surface on；
Described oscillatory pressure pick-up（25）Quantity be m, m >=2, installed in air intake duct（11）Outlet on, be used for
The fluctuation pressure at wall diverse location is measured, fluctuation pressure signal is obtained and exports to signal processor（3）；Described first
Sensor（24）Quantity be n, n >=2, installed in pressure stabilizing cavity（22）Internal face on, for measuring microjet（23）Pressure,
Obtain microjet pressure signal and export to signal processor（3）；
Described signal processor（3）Including signal conditioner, low pass filter, bandpass filter and root mean square calculator；The
One sensor（24）Microjet pressure signal amplify through signal conditioner, export after low pass filtered to real-time control
Device processed（4）Input；Oscillatory pressure pick-up（25）Fluctuation pressure signal amplify through signal conditioner, bandpass filter band
Pass filter, root mean square calculator are calculated after root mean square, output to real-time controller（4）Input；
Described real-time controller（4）Including input, output end, processor and memory；Input receives flight control system hair
Flight status parameter, the signal processor gone out（3）The microjet pressure signal and fluctuation pressure root-mean-squared sent, and convert
For data signal；Processor reads the data signal of input, while data signal is preserved in memory, processor is utilized
Pressure sensor failure determining program, oscillatory pressure pick-up breakdown judge program, feedback calculation procedure in memory, control
Target calculation procedure, stable state determining program, subregion PID control program calculate control instruction and exported to output end；Output end will
The data signal of control instruction, which is converted to, to be exported after analog signal to microjet pressure regulator valve（21）.
2. airplane intake closed-loop flow control device according to claim 1, it is characterised in that described signal transacting
Device（3）It is that each microjet pressure signal and fluctuation pressure signal respectively assign an independent treatment channel.
3. airplane intake closed-loop flow control device according to claim 1, it is characterised in that described state of flight
Parameter includes flying speed, aspect, flying height.
4. airplane intake closed-loop flow control device according to claim 1, it is characterised in that the first described sensing
Device（24）1, remaining first sensor are used every time（24）For backup.
5. airplane intake closed-loop flow control device according to claim 1, it is characterised in that described fluctuation pressure
Sensor（25）1 ~ 2, remaining oscillatory pressure pick-up are used every time（25）For backup.
6. a kind of airplane intake closed-loop flow control method, it is characterised in that comprise the following steps：
A. first sensor is judged（24）With the presence or absence of failure；
Real-time controller（4）Read signal processor（3）The microjet pressure signal of output, the first sensing in memory
Device breakdown judge program, judges 1 currently used first sensor（24）With the presence or absence of failure；If it is judged that be it is no,
Be continuing with and take its measure microjet pressure value beP j ；If it is judged that being yes, in remaining n-1 first sensor
（24）1 first sensor working properly of middle selection（24）, and take its measure microjet pressure value beP j ；If all of
N first sensor（24）Break down, then closing control system；
B. oscillatory pressure pick-up is judged（25）With the presence or absence of failure；
Real-time controller（4）Read signal processor（3）The fluctuation pressure root-mean-squared of output, the pulsation in memory
Pressure sensor failure determining program, judges 1 currently used or 2 oscillatory pressure pick-ups（25）With the presence or absence of failure；
If it is judged that being no, then it is continuing with, and it is Δ to calculate the fluctuation pressure root-mean-square value of measurementp rmsi , i=1 or i=2；Such as
Fruit judged result is yes, in remaining oscillatory pressure pick-up（25）In reselect 1 or 2 fluctuation pressures working properly
Sensor（25）, and it is Δ to calculate the fluctuation pressure root-mean-square value of measurementp rmsi , i=1 or i=2；If all of m pulsation pressure
Force snesor（25）Break down, then closing control system；
C. dimensionless value of feedback is calculated；
Real-time controller（4）Utilize Δp rmsi Divided byP j Obtain nondimensional Δp rmsi /P j , further according to the first sensor used
（24）Numbering, oscillatory pressure pick-up（25）Value of feedback calculation procedure in numbering and quantity, memory, selection value of feedback is calculated
Modelf, calculate the dimensionless value of feedback of characterization control effectH res ：
When 1 oscillatory pressure pick-up of use（25）When, value of feedback computation modelfFor：
Or
D. control targe value is calculated；
Real-time controller（4）According to current flight state parameter, first sensor（24）Numbering, oscillatory pressure pick-up（25）Compile
Number and quantity, memory in control targe calculation procedure and value of feedback computation modelf, calculate corresponding control targe valueH ref ；
E. systematic steady state and more new control instruction are judged；
Real-time controller（4）Stable state determining program in memory,H ref WithH res Error amount, judge whether system is in
Stable state；If the determination result is YES, then current control instruction is maintained, control instruction is otherwise calculated according to subregion PID control program；
Microjet pressure regulator valve（21）Microjet pressure is adjusted according to control instruction, and then influences air intake duct（11）Flow regime so that
Air intake duct（11）The oscillatory pressure pick-up of outlet（25）Measured value change；
F. signal measurement and processing；
First sensor（24）And oscillatory pressure pick-up（25）Measurement microjet pressure signal and fluctuation pressure signal, believe respectively
Number processor will be exported to real-time controller after microjet pressure signal and fluctuation pressure signal transacting（4）, repeat step a ~ f,
Until stopping closed-loop control.
7. airplane intake closed-loop flow control method according to claim 6, it is characterised in that described fluctuation pressure
The timing statisticses of root-mean-square value are 0.5 second ~ 1.0 seconds.
8. airplane intake closed-loop flow control method according to claim 6, it is characterised in that described state of flight
Parameter reaches that the stable state judgment criterion of stable state is：Flight status parameter kept within 5 minutes it is constant andH ref WithH res Phase
To error within ± 5%.
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| CN106335642B (en) * | 2016-09-27 | 2018-10-19 | 中国空气动力研究与发展中心高速空气动力研究所 | A kind of noise suppression device for weapon bay based on environmental gas jet flow |
| CN107290080B (en) * | 2017-08-08 | 2019-10-22 | 珠海格力电器股份有限公司 | Thermal bulb fault detection method and system |
| CN109050869A (en) * | 2018-07-17 | 2018-12-21 | 中国航空工业集团公司沈阳飞机设计研究所 | A kind of ram-air bleed structure |
| CN112455699B (en) * | 2020-11-13 | 2024-01-02 | 中国航空工业集团公司沈阳飞机设计研究所 | High-fusion aircraft rear body |
| CN115357040B (en) * | 2022-10-19 | 2022-12-20 | 中国空气动力研究与发展中心低速空气动力研究所 | Jet control flight verification method and flight verification model |
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| US8225592B1 (en) * | 2003-06-09 | 2012-07-24 | Florida State University Research Foundation | Microjet noise suppression system for jet engines |
| US8303024B2 (en) * | 2010-02-22 | 2012-11-06 | Florida State University Research Foundation | Microjet control for flow and noise reduction in automotive applications |
| US8894019B2 (en) * | 2012-12-31 | 2014-11-25 | Florida State University Office of Commercialization | Method of using microjet actuators for the control of flow separation and distortion |
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| US8225592B1 (en) * | 2003-06-09 | 2012-07-24 | Florida State University Research Foundation | Microjet noise suppression system for jet engines |
| CN101187387A (en) * | 2007-11-20 | 2008-05-28 | 南京航空航天大学 | Three-rib type micro pneumatic valve |
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| US8303024B2 (en) * | 2010-02-22 | 2012-11-06 | Florida State University Research Foundation | Microjet control for flow and noise reduction in automotive applications |
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